This source file includes following definitions.
- canif_is_active
- softing_set_reset_dpram
- softing_clr_reset_dpram
- softing_netdev_start_xmit
- softing_netdev_rx
- softing_handle_1
- softing_irq_thread
- softing_irq_v2
- softing_irq_v1
- softing_netdev_open
- softing_netdev_stop
- softing_candev_set_mode
- softing_enable_irq
- softing_card_shutdown
- softing_card_boot
- show_chip
- show_output
- store_output
- softing_netdev_create
- softing_netdev_register
- softing_netdev_cleanup
- softing_pdev_remove
- softing_pdev_probe
1
2
3
4
5
6
7
8 #include <linux/module.h>
9 #include <linux/interrupt.h>
10 #include <asm/io.h>
11
12 #include "softing.h"
13
14 #define TX_ECHO_SKB_MAX (((TXMAX+1)/2)-1)
15
16
17
18
19
20 static inline int canif_is_active(struct net_device *netdev)
21 {
22 struct can_priv *can = netdev_priv(netdev);
23
24 if (!netif_running(netdev))
25 return 0;
26 return (can->state <= CAN_STATE_ERROR_PASSIVE);
27 }
28
29
30 static inline void softing_set_reset_dpram(struct softing *card)
31 {
32 if (card->pdat->generation >= 2) {
33 spin_lock_bh(&card->spin);
34 iowrite8(ioread8(&card->dpram[DPRAM_V2_RESET]) & ~1,
35 &card->dpram[DPRAM_V2_RESET]);
36 spin_unlock_bh(&card->spin);
37 }
38 }
39
40 static inline void softing_clr_reset_dpram(struct softing *card)
41 {
42 if (card->pdat->generation >= 2) {
43 spin_lock_bh(&card->spin);
44 iowrite8(ioread8(&card->dpram[DPRAM_V2_RESET]) | 1,
45 &card->dpram[DPRAM_V2_RESET]);
46 spin_unlock_bh(&card->spin);
47 }
48 }
49
50
51 static netdev_tx_t softing_netdev_start_xmit(struct sk_buff *skb,
52 struct net_device *dev)
53 {
54 struct softing_priv *priv = netdev_priv(dev);
55 struct softing *card = priv->card;
56 int ret;
57 uint8_t *ptr;
58 uint8_t fifo_wr, fifo_rd;
59 struct can_frame *cf = (struct can_frame *)skb->data;
60 uint8_t buf[DPRAM_TX_SIZE];
61
62 if (can_dropped_invalid_skb(dev, skb))
63 return NETDEV_TX_OK;
64
65 spin_lock(&card->spin);
66
67 ret = NETDEV_TX_BUSY;
68 if (!card->fw.up ||
69 (card->tx.pending >= TXMAX) ||
70 (priv->tx.pending >= TX_ECHO_SKB_MAX))
71 goto xmit_done;
72 fifo_wr = ioread8(&card->dpram[DPRAM_TX_WR]);
73 fifo_rd = ioread8(&card->dpram[DPRAM_TX_RD]);
74 if (fifo_wr == fifo_rd)
75
76 goto xmit_done;
77 memset(buf, 0, sizeof(buf));
78 ptr = buf;
79 *ptr = CMD_TX;
80 if (cf->can_id & CAN_RTR_FLAG)
81 *ptr |= CMD_RTR;
82 if (cf->can_id & CAN_EFF_FLAG)
83 *ptr |= CMD_XTD;
84 if (priv->index)
85 *ptr |= CMD_BUS2;
86 ++ptr;
87 *ptr++ = cf->can_dlc;
88 *ptr++ = (cf->can_id >> 0);
89 *ptr++ = (cf->can_id >> 8);
90 if (cf->can_id & CAN_EFF_FLAG) {
91 *ptr++ = (cf->can_id >> 16);
92 *ptr++ = (cf->can_id >> 24);
93 } else {
94
95 ptr += 1;
96 }
97 if (!(cf->can_id & CAN_RTR_FLAG))
98 memcpy(ptr, &cf->data[0], cf->can_dlc);
99 memcpy_toio(&card->dpram[DPRAM_TX + DPRAM_TX_SIZE * fifo_wr],
100 buf, DPRAM_TX_SIZE);
101 if (++fifo_wr >= DPRAM_TX_CNT)
102 fifo_wr = 0;
103 iowrite8(fifo_wr, &card->dpram[DPRAM_TX_WR]);
104 card->tx.last_bus = priv->index;
105 ++card->tx.pending;
106 ++priv->tx.pending;
107 can_put_echo_skb(skb, dev, priv->tx.echo_put);
108 ++priv->tx.echo_put;
109 if (priv->tx.echo_put >= TX_ECHO_SKB_MAX)
110 priv->tx.echo_put = 0;
111
112 ret = NETDEV_TX_OK;
113 xmit_done:
114 spin_unlock(&card->spin);
115 if (card->tx.pending >= TXMAX) {
116 int j;
117 for (j = 0; j < ARRAY_SIZE(card->net); ++j) {
118 if (card->net[j])
119 netif_stop_queue(card->net[j]);
120 }
121 }
122 if (ret != NETDEV_TX_OK)
123 netif_stop_queue(dev);
124
125 return ret;
126 }
127
128
129
130
131 int softing_netdev_rx(struct net_device *netdev, const struct can_frame *msg,
132 ktime_t ktime)
133 {
134 struct sk_buff *skb;
135 struct can_frame *cf;
136
137 skb = alloc_can_skb(netdev, &cf);
138 if (!skb)
139 return -ENOMEM;
140 memcpy(cf, msg, sizeof(*msg));
141 skb->tstamp = ktime;
142 return netif_rx(skb);
143 }
144
145
146
147
148
149 static int softing_handle_1(struct softing *card)
150 {
151 struct net_device *netdev;
152 struct softing_priv *priv;
153 ktime_t ktime;
154 struct can_frame msg;
155 int cnt = 0, lost_msg;
156 uint8_t fifo_rd, fifo_wr, cmd;
157 uint8_t *ptr;
158 uint32_t tmp_u32;
159 uint8_t buf[DPRAM_RX_SIZE];
160
161 memset(&msg, 0, sizeof(msg));
162
163 lost_msg = ioread8(&card->dpram[DPRAM_RX_LOST]);
164 if (lost_msg) {
165 int j;
166
167 iowrite8(0, &card->dpram[DPRAM_RX_LOST]);
168
169 msg.can_id = CAN_ERR_FLAG | CAN_ERR_CRTL;
170 msg.can_dlc = CAN_ERR_DLC;
171 msg.data[1] = CAN_ERR_CRTL_RX_OVERFLOW;
172
173
174
175
176 for (j = 0; j < ARRAY_SIZE(card->net); ++j) {
177 netdev = card->net[j];
178 if (!netdev)
179 continue;
180 if (!canif_is_active(netdev))
181
182 continue;
183 ++netdev->stats.rx_over_errors;
184 softing_netdev_rx(netdev, &msg, 0);
185 }
186
187 memset(&msg, 0, sizeof(msg));
188 ++cnt;
189 }
190
191 fifo_rd = ioread8(&card->dpram[DPRAM_RX_RD]);
192 fifo_wr = ioread8(&card->dpram[DPRAM_RX_WR]);
193
194 if (++fifo_rd >= DPRAM_RX_CNT)
195 fifo_rd = 0;
196 if (fifo_wr == fifo_rd)
197 return cnt;
198
199 memcpy_fromio(buf, &card->dpram[DPRAM_RX + DPRAM_RX_SIZE*fifo_rd],
200 DPRAM_RX_SIZE);
201 mb();
202
203 iowrite8(fifo_rd, &card->dpram[DPRAM_RX_RD]);
204
205 ptr = buf;
206 cmd = *ptr++;
207 if (cmd == 0xff)
208
209 return 0;
210 netdev = card->net[0];
211 if (cmd & CMD_BUS2)
212 netdev = card->net[1];
213 priv = netdev_priv(netdev);
214
215 if (cmd & CMD_ERR) {
216 uint8_t can_state, state;
217
218 state = *ptr++;
219
220 msg.can_id = CAN_ERR_FLAG;
221 msg.can_dlc = CAN_ERR_DLC;
222
223 if (state & SF_MASK_BUSOFF) {
224 can_state = CAN_STATE_BUS_OFF;
225 msg.can_id |= CAN_ERR_BUSOFF;
226 state = STATE_BUSOFF;
227 } else if (state & SF_MASK_EPASSIVE) {
228 can_state = CAN_STATE_ERROR_PASSIVE;
229 msg.can_id |= CAN_ERR_CRTL;
230 msg.data[1] = CAN_ERR_CRTL_TX_PASSIVE;
231 state = STATE_EPASSIVE;
232 } else {
233 can_state = CAN_STATE_ERROR_ACTIVE;
234 msg.can_id |= CAN_ERR_CRTL;
235 state = STATE_EACTIVE;
236 }
237
238 iowrite8(state, &card->dpram[priv->index ?
239 DPRAM_INFO_BUSSTATE2 : DPRAM_INFO_BUSSTATE]);
240
241 tmp_u32 = le32_to_cpup((void *)ptr);
242 ptr += 4;
243 ktime = softing_raw2ktime(card, tmp_u32);
244
245 ++netdev->stats.rx_errors;
246
247 if (can_state != priv->can.state) {
248 priv->can.state = can_state;
249 if (can_state == CAN_STATE_ERROR_PASSIVE)
250 ++priv->can.can_stats.error_passive;
251 else if (can_state == CAN_STATE_BUS_OFF) {
252
253 ++priv->can.can_stats.bus_off;
254 can_bus_off(netdev);
255 netif_stop_queue(netdev);
256 }
257
258 softing_netdev_rx(netdev, &msg, ktime);
259 }
260
261 } else {
262 if (cmd & CMD_RTR)
263 msg.can_id |= CAN_RTR_FLAG;
264 msg.can_dlc = get_can_dlc(*ptr++);
265 if (cmd & CMD_XTD) {
266 msg.can_id |= CAN_EFF_FLAG;
267 msg.can_id |= le32_to_cpup((void *)ptr);
268 ptr += 4;
269 } else {
270 msg.can_id |= le16_to_cpup((void *)ptr);
271 ptr += 2;
272 }
273
274 tmp_u32 = le32_to_cpup((void *)ptr);
275 ptr += 4;
276 ktime = softing_raw2ktime(card, tmp_u32);
277 if (!(msg.can_id & CAN_RTR_FLAG))
278 memcpy(&msg.data[0], ptr, 8);
279 ptr += 8;
280
281 if (cmd & CMD_ACK) {
282
283 struct sk_buff *skb;
284 skb = priv->can.echo_skb[priv->tx.echo_get];
285 if (skb)
286 skb->tstamp = ktime;
287 can_get_echo_skb(netdev, priv->tx.echo_get);
288 ++priv->tx.echo_get;
289 if (priv->tx.echo_get >= TX_ECHO_SKB_MAX)
290 priv->tx.echo_get = 0;
291 if (priv->tx.pending)
292 --priv->tx.pending;
293 if (card->tx.pending)
294 --card->tx.pending;
295 ++netdev->stats.tx_packets;
296 if (!(msg.can_id & CAN_RTR_FLAG))
297 netdev->stats.tx_bytes += msg.can_dlc;
298 } else {
299 int ret;
300
301 ret = softing_netdev_rx(netdev, &msg, ktime);
302 if (ret == NET_RX_SUCCESS) {
303 ++netdev->stats.rx_packets;
304 if (!(msg.can_id & CAN_RTR_FLAG))
305 netdev->stats.rx_bytes += msg.can_dlc;
306 } else {
307 ++netdev->stats.rx_dropped;
308 }
309 }
310 }
311 ++cnt;
312 return cnt;
313 }
314
315
316
317
318 static irqreturn_t softing_irq_thread(int irq, void *dev_id)
319 {
320 struct softing *card = (struct softing *)dev_id;
321 struct net_device *netdev;
322 struct softing_priv *priv;
323 int j, offset, work_done;
324
325 work_done = 0;
326 spin_lock_bh(&card->spin);
327 while (softing_handle_1(card) > 0) {
328 ++card->irq.svc_count;
329 ++work_done;
330 }
331 spin_unlock_bh(&card->spin);
332
333 offset = card->tx.last_bus;
334 for (j = 0; j < ARRAY_SIZE(card->net); ++j) {
335 if (card->tx.pending >= TXMAX)
336 break;
337 netdev = card->net[(j + offset + 1) % card->pdat->nbus];
338 if (!netdev)
339 continue;
340 priv = netdev_priv(netdev);
341 if (!canif_is_active(netdev))
342
343 continue;
344 if (priv->tx.pending >= TX_ECHO_SKB_MAX)
345 continue;
346 ++work_done;
347 netif_wake_queue(netdev);
348 }
349 return work_done ? IRQ_HANDLED : IRQ_NONE;
350 }
351
352
353
354
355
356 static irqreturn_t softing_irq_v2(int irq, void *dev_id)
357 {
358 struct softing *card = (struct softing *)dev_id;
359 uint8_t ir;
360
361 ir = ioread8(&card->dpram[DPRAM_V2_IRQ_TOHOST]);
362 iowrite8(0, &card->dpram[DPRAM_V2_IRQ_TOHOST]);
363 return (1 == ir) ? IRQ_WAKE_THREAD : IRQ_NONE;
364 }
365
366 static irqreturn_t softing_irq_v1(int irq, void *dev_id)
367 {
368 struct softing *card = (struct softing *)dev_id;
369 uint8_t ir;
370
371 ir = ioread8(&card->dpram[DPRAM_IRQ_TOHOST]);
372 iowrite8(0, &card->dpram[DPRAM_IRQ_TOHOST]);
373 return ir ? IRQ_WAKE_THREAD : IRQ_NONE;
374 }
375
376
377
378
379 static int softing_netdev_open(struct net_device *ndev)
380 {
381 int ret;
382
383
384 ret = open_candev(ndev);
385 if (!ret)
386 ret = softing_startstop(ndev, 1);
387 return ret;
388 }
389
390 static int softing_netdev_stop(struct net_device *ndev)
391 {
392 int ret;
393
394 netif_stop_queue(ndev);
395
396
397 ret = softing_startstop(ndev, 0);
398 return ret;
399 }
400
401 static int softing_candev_set_mode(struct net_device *ndev, enum can_mode mode)
402 {
403 int ret;
404
405 switch (mode) {
406 case CAN_MODE_START:
407
408 ret = softing_startstop(ndev, 1);
409 return ret;
410 case CAN_MODE_STOP:
411 case CAN_MODE_SLEEP:
412 return -EOPNOTSUPP;
413 }
414 return 0;
415 }
416
417
418
419
420 int softing_enable_irq(struct softing *card, int enable)
421 {
422 int ret;
423
424 if (!card->irq.nr) {
425 return 0;
426 } else if (card->irq.requested && !enable) {
427 free_irq(card->irq.nr, card);
428 card->irq.requested = 0;
429 } else if (!card->irq.requested && enable) {
430 ret = request_threaded_irq(card->irq.nr,
431 (card->pdat->generation >= 2) ?
432 softing_irq_v2 : softing_irq_v1,
433 softing_irq_thread, IRQF_SHARED,
434 dev_name(&card->pdev->dev), card);
435 if (ret) {
436 dev_alert(&card->pdev->dev,
437 "request_threaded_irq(%u) failed\n",
438 card->irq.nr);
439 return ret;
440 }
441 card->irq.requested = 1;
442 }
443 return 0;
444 }
445
446 static void softing_card_shutdown(struct softing *card)
447 {
448 int fw_up = 0;
449
450 if (mutex_lock_interruptible(&card->fw.lock))
451 ;
452 fw_up = card->fw.up;
453 card->fw.up = 0;
454
455 if (card->irq.requested && card->irq.nr) {
456 free_irq(card->irq.nr, card);
457 card->irq.requested = 0;
458 }
459 if (fw_up) {
460 if (card->pdat->enable_irq)
461 card->pdat->enable_irq(card->pdev, 0);
462 softing_set_reset_dpram(card);
463 if (card->pdat->reset)
464 card->pdat->reset(card->pdev, 1);
465 }
466 mutex_unlock(&card->fw.lock);
467 }
468
469 static int softing_card_boot(struct softing *card)
470 {
471 int ret, j;
472 static const uint8_t stream[] = {
473 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, };
474 unsigned char back[sizeof(stream)];
475
476 if (mutex_lock_interruptible(&card->fw.lock))
477 return -ERESTARTSYS;
478 if (card->fw.up) {
479 mutex_unlock(&card->fw.lock);
480 return 0;
481 }
482
483 if (card->pdat->enable_irq)
484 card->pdat->enable_irq(card->pdev, 1);
485
486 softing_set_reset_dpram(card);
487 if (card->pdat->reset)
488 card->pdat->reset(card->pdev, 1);
489 for (j = 0; (j + sizeof(stream)) < card->dpram_size;
490 j += sizeof(stream)) {
491
492 memcpy_toio(&card->dpram[j], stream, sizeof(stream));
493
494 mb();
495 memcpy_fromio(back, &card->dpram[j], sizeof(stream));
496
497 if (!memcmp(back, stream, sizeof(stream)))
498 continue;
499
500 dev_alert(&card->pdev->dev, "dpram failed at 0x%04x\n", j);
501 ret = -EIO;
502 goto failed;
503 }
504 wmb();
505
506 ret = softing_load_fw(card->pdat->boot.fw, card, card->dpram,
507 card->dpram_size,
508 card->pdat->boot.offs - card->pdat->boot.addr);
509 if (ret < 0)
510 goto failed;
511
512 ret = softing_load_fw(card->pdat->load.fw, card, card->dpram,
513 card->dpram_size,
514 card->pdat->load.offs - card->pdat->load.addr);
515 if (ret < 0)
516 goto failed;
517
518 if (card->pdat->reset)
519 card->pdat->reset(card->pdev, 0);
520 softing_clr_reset_dpram(card);
521 ret = softing_bootloader_command(card, 0, "card boot");
522 if (ret < 0)
523 goto failed;
524 ret = softing_load_app_fw(card->pdat->app.fw, card);
525 if (ret < 0)
526 goto failed;
527
528 ret = softing_chip_poweron(card);
529 if (ret < 0)
530 goto failed;
531
532 card->fw.up = 1;
533 mutex_unlock(&card->fw.lock);
534 return 0;
535 failed:
536 card->fw.up = 0;
537 if (card->pdat->enable_irq)
538 card->pdat->enable_irq(card->pdev, 0);
539 softing_set_reset_dpram(card);
540 if (card->pdat->reset)
541 card->pdat->reset(card->pdev, 1);
542 mutex_unlock(&card->fw.lock);
543 return ret;
544 }
545
546
547
548
549 static ssize_t show_chip(struct device *dev, struct device_attribute *attr,
550 char *buf)
551 {
552 struct net_device *ndev = to_net_dev(dev);
553 struct softing_priv *priv = netdev2softing(ndev);
554
555 return sprintf(buf, "%i\n", priv->chip);
556 }
557
558 static ssize_t show_output(struct device *dev, struct device_attribute *attr,
559 char *buf)
560 {
561 struct net_device *ndev = to_net_dev(dev);
562 struct softing_priv *priv = netdev2softing(ndev);
563
564 return sprintf(buf, "0x%02x\n", priv->output);
565 }
566
567 static ssize_t store_output(struct device *dev, struct device_attribute *attr,
568 const char *buf, size_t count)
569 {
570 struct net_device *ndev = to_net_dev(dev);
571 struct softing_priv *priv = netdev2softing(ndev);
572 struct softing *card = priv->card;
573 unsigned long val;
574 int ret;
575
576 ret = kstrtoul(buf, 0, &val);
577 if (ret < 0)
578 return ret;
579 val &= 0xFF;
580
581 ret = mutex_lock_interruptible(&card->fw.lock);
582 if (ret)
583 return -ERESTARTSYS;
584 if (netif_running(ndev)) {
585 mutex_unlock(&card->fw.lock);
586 return -EBUSY;
587 }
588 priv->output = val;
589 mutex_unlock(&card->fw.lock);
590 return count;
591 }
592
593 static const DEVICE_ATTR(chip, 0444, show_chip, NULL);
594 static const DEVICE_ATTR(output, 0644, show_output, store_output);
595
596 static const struct attribute *const netdev_sysfs_attrs[] = {
597 &dev_attr_chip.attr,
598 &dev_attr_output.attr,
599 NULL,
600 };
601 static const struct attribute_group netdev_sysfs_group = {
602 .name = NULL,
603 .attrs = (struct attribute **)netdev_sysfs_attrs,
604 };
605
606 static const struct net_device_ops softing_netdev_ops = {
607 .ndo_open = softing_netdev_open,
608 .ndo_stop = softing_netdev_stop,
609 .ndo_start_xmit = softing_netdev_start_xmit,
610 .ndo_change_mtu = can_change_mtu,
611 };
612
613 static const struct can_bittiming_const softing_btr_const = {
614 .name = "softing",
615 .tseg1_min = 1,
616 .tseg1_max = 16,
617 .tseg2_min = 1,
618 .tseg2_max = 8,
619 .sjw_max = 4,
620 .brp_min = 1,
621 .brp_max = 32,
622 .brp_inc = 1,
623 };
624
625
626 static struct net_device *softing_netdev_create(struct softing *card,
627 uint16_t chip_id)
628 {
629 struct net_device *netdev;
630 struct softing_priv *priv;
631
632 netdev = alloc_candev(sizeof(*priv), TX_ECHO_SKB_MAX);
633 if (!netdev) {
634 dev_alert(&card->pdev->dev, "alloc_candev failed\n");
635 return NULL;
636 }
637 priv = netdev_priv(netdev);
638 priv->netdev = netdev;
639 priv->card = card;
640 memcpy(&priv->btr_const, &softing_btr_const, sizeof(priv->btr_const));
641 priv->btr_const.brp_max = card->pdat->max_brp;
642 priv->btr_const.sjw_max = card->pdat->max_sjw;
643 priv->can.bittiming_const = &priv->btr_const;
644 priv->can.clock.freq = 8000000;
645 priv->chip = chip_id;
646 priv->output = softing_default_output(netdev);
647 SET_NETDEV_DEV(netdev, &card->pdev->dev);
648
649 netdev->flags |= IFF_ECHO;
650 netdev->netdev_ops = &softing_netdev_ops;
651 priv->can.do_set_mode = softing_candev_set_mode;
652 priv->can.ctrlmode_supported = CAN_CTRLMODE_3_SAMPLES;
653
654 return netdev;
655 }
656
657 static int softing_netdev_register(struct net_device *netdev)
658 {
659 int ret;
660
661 ret = register_candev(netdev);
662 if (ret) {
663 dev_alert(&netdev->dev, "register failed\n");
664 return ret;
665 }
666 if (sysfs_create_group(&netdev->dev.kobj, &netdev_sysfs_group) < 0)
667 netdev_alert(netdev, "sysfs group failed\n");
668
669 return 0;
670 }
671
672 static void softing_netdev_cleanup(struct net_device *netdev)
673 {
674 sysfs_remove_group(&netdev->dev.kobj, &netdev_sysfs_group);
675 unregister_candev(netdev);
676 free_candev(netdev);
677 }
678
679
680
681
682 #define DEV_ATTR_RO(name, member) \
683 static ssize_t show_##name(struct device *dev, \
684 struct device_attribute *attr, char *buf) \
685 { \
686 struct softing *card = dev_get_drvdata(dev); \
687 return sprintf(buf, "%u\n", card->member); \
688 } \
689 static DEVICE_ATTR(name, 0444, show_##name, NULL)
690
691 #define DEV_ATTR_RO_STR(name, member) \
692 static ssize_t show_##name(struct device *dev, \
693 struct device_attribute *attr, char *buf) \
694 { \
695 struct softing *card = dev_get_drvdata(dev); \
696 return sprintf(buf, "%s\n", card->member); \
697 } \
698 static DEVICE_ATTR(name, 0444, show_##name, NULL)
699
700 DEV_ATTR_RO(serial, id.serial);
701 DEV_ATTR_RO_STR(firmware, pdat->app.fw);
702 DEV_ATTR_RO(firmware_version, id.fw_version);
703 DEV_ATTR_RO_STR(hardware, pdat->name);
704 DEV_ATTR_RO(hardware_version, id.hw_version);
705 DEV_ATTR_RO(license, id.license);
706
707 static struct attribute *softing_pdev_attrs[] = {
708 &dev_attr_serial.attr,
709 &dev_attr_firmware.attr,
710 &dev_attr_firmware_version.attr,
711 &dev_attr_hardware.attr,
712 &dev_attr_hardware_version.attr,
713 &dev_attr_license.attr,
714 NULL,
715 };
716
717 static const struct attribute_group softing_pdev_group = {
718 .name = NULL,
719 .attrs = softing_pdev_attrs,
720 };
721
722
723
724
725 static int softing_pdev_remove(struct platform_device *pdev)
726 {
727 struct softing *card = platform_get_drvdata(pdev);
728 int j;
729
730
731 softing_card_shutdown(card);
732
733 for (j = 0; j < ARRAY_SIZE(card->net); ++j) {
734 if (!card->net[j])
735 continue;
736 softing_netdev_cleanup(card->net[j]);
737 card->net[j] = NULL;
738 }
739 sysfs_remove_group(&pdev->dev.kobj, &softing_pdev_group);
740
741 iounmap(card->dpram);
742 kfree(card);
743 return 0;
744 }
745
746 static int softing_pdev_probe(struct platform_device *pdev)
747 {
748 const struct softing_platform_data *pdat = dev_get_platdata(&pdev->dev);
749 struct softing *card;
750 struct net_device *netdev;
751 struct softing_priv *priv;
752 struct resource *pres;
753 int ret;
754 int j;
755
756 if (!pdat) {
757 dev_warn(&pdev->dev, "no platform data\n");
758 return -EINVAL;
759 }
760 if (pdat->nbus > ARRAY_SIZE(card->net)) {
761 dev_warn(&pdev->dev, "%u nets??\n", pdat->nbus);
762 return -EINVAL;
763 }
764
765 card = kzalloc(sizeof(*card), GFP_KERNEL);
766 if (!card)
767 return -ENOMEM;
768 card->pdat = pdat;
769 card->pdev = pdev;
770 platform_set_drvdata(pdev, card);
771 mutex_init(&card->fw.lock);
772 spin_lock_init(&card->spin);
773
774 ret = -EINVAL;
775 pres = platform_get_resource(pdev, IORESOURCE_MEM, 0);
776 if (!pres)
777 goto platform_resource_failed;
778 card->dpram_phys = pres->start;
779 card->dpram_size = resource_size(pres);
780 card->dpram = ioremap_nocache(card->dpram_phys, card->dpram_size);
781 if (!card->dpram) {
782 dev_alert(&card->pdev->dev, "dpram ioremap failed\n");
783 goto ioremap_failed;
784 }
785
786 pres = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
787 if (pres)
788 card->irq.nr = pres->start;
789
790
791 ret = softing_card_boot(card);
792 if (ret < 0) {
793 dev_alert(&pdev->dev, "failed to boot\n");
794 goto boot_failed;
795 }
796
797
798 card->id.freq = card->pdat->freq;
799
800 ret = sysfs_create_group(&pdev->dev.kobj, &softing_pdev_group);
801 if (ret < 0) {
802 dev_alert(&card->pdev->dev, "sysfs failed\n");
803 goto sysfs_failed;
804 }
805
806 for (j = 0; j < ARRAY_SIZE(card->net); ++j) {
807 card->net[j] = netdev =
808 softing_netdev_create(card, card->id.chip[j]);
809 if (!netdev) {
810 dev_alert(&pdev->dev, "failed to make can[%i]", j);
811 ret = -ENOMEM;
812 goto netdev_failed;
813 }
814 netdev->dev_id = j;
815 priv = netdev_priv(card->net[j]);
816 priv->index = j;
817 ret = softing_netdev_register(netdev);
818 if (ret) {
819 free_candev(netdev);
820 card->net[j] = NULL;
821 dev_alert(&card->pdev->dev,
822 "failed to register can[%i]\n", j);
823 goto netdev_failed;
824 }
825 }
826 dev_info(&card->pdev->dev, "%s ready.\n", card->pdat->name);
827 return 0;
828
829 netdev_failed:
830 for (j = 0; j < ARRAY_SIZE(card->net); ++j) {
831 if (!card->net[j])
832 continue;
833 softing_netdev_cleanup(card->net[j]);
834 }
835 sysfs_remove_group(&pdev->dev.kobj, &softing_pdev_group);
836 sysfs_failed:
837 softing_card_shutdown(card);
838 boot_failed:
839 iounmap(card->dpram);
840 ioremap_failed:
841 platform_resource_failed:
842 kfree(card);
843 return ret;
844 }
845
846 static struct platform_driver softing_driver = {
847 .driver = {
848 .name = "softing",
849 },
850 .probe = softing_pdev_probe,
851 .remove = softing_pdev_remove,
852 };
853
854 module_platform_driver(softing_driver);
855
856 MODULE_ALIAS("platform:softing");
857 MODULE_DESCRIPTION("Softing DPRAM CAN driver");
858 MODULE_AUTHOR("Kurt Van Dijck <kurt.van.dijck@eia.be>");
859 MODULE_LICENSE("GPL v2");